Aluminum alloy and aluminum alloy structural member

Abstract

The present disclosure discloses an aluminum alloy, based on a total mass of the aluminum alloy, including: 9-12% Si; 3.0-5.0% Zn; 1.5-2.6% Cu; 0.4-0.9% Mn; 0.2-0.6% Mg; 0.1-0.25% Fe; 0.03-0.35% Zr; 0.05-0.2% Ti; 0.005-0.04% Sr; 0.01-0.02% Ga; 0.005-0.01% Mo; 0.001-0.02% Cr; 0.005-0.3% Ni; 78.01-85.624% Al; and an impurity element.

What is claimed is: 
     
         1 . An aluminum alloy, based on a total mass of the aluminum alloy, comprising:
 9-12% Si;   3.0-5.0% Zn;   1.5-2.6% Cu;   0.4-0.9% Mn;   0.2-0.6% Mg;   0.1-0.25% Fe;   0.03-0.35% Zr;   0.05-0.2% Ti;   0.005-0.04% Sr;   0.01-0.02% Ga;   0.005-0.01% Mo;   0.001-0.02% Cr;   0.005-0.3% Ni;   78.01-85.624% Al; and an impurity element.   
     
     
         2 . The aluminum alloy according to  claim 1 , further comprising Er, wherein a content of Er is in a range of 0-0.35%. 
     
     
         3 . The aluminum alloy according to  claim 2 , wherein a mass ratio between Er and Zr is in a range of (0.01-0.5):1. 
     
     
         4 . The aluminum alloy according to  claim 1 , wherein a mass ratio between Zr and Ti is in a range of (2-6):1. 
     
     
         5 . The aluminum alloy according to  claim 1 , wherein a mass ratio between Zn and Cu is in a range of (1.2-2.5):1. 
     
     
         6 . The aluminum alloy according to  claim 1 , wherein the aluminum alloy is a die-casting aluminum alloy. 
     
     
         7 . The aluminum alloy according to  claim 1 , wherein
 a yield strength of the aluminum alloy is not less than 260 Mpa;   a tensile strength is not less than 380 Mpa; an elongation at break is not less than 4%;   a die-casting fluidity is not less than 90%; and   a thermal conductivity is not less than 130 W/(m·K).   
     
     
         8 . The aluminum alloy according to  claim 1 , wherein
 a yield strength of the aluminum alloy is in a range of 260-310 Mpa;   a tensile strength is in a range of 380-440 Mpa;   an elongation at break is in a range of 4-7%;   a die-casting fluidity is not less than 90%; and   a thermal conductivity is in a range of 130-150 W/(m K).   
     
     
         9 . An aluminum alloy structural member, wherein the aluminum alloy structural member comprises an aluminum alloy, and based on a total mass of the aluminum alloy, the aluminum alloy comprises:
 9-12% Si;   3.0-5.0% Zn;   1.5-2.6% Cu;   0.4-0.9% Mn;   0.2-0.6% Mg;   0.1-0.25% Fe;   0.03-0.35% Zr;   0.05-0.2% Ti;   0.005-0.04% Sr;   0.01-0.02% Ga;   0.005-0.01% Mo;   0.001-0.02% Cr;   0.005-0.3% Ni;   78.01-85.624% Al; and an impurity element.   
     
     
         10 . The aluminum alloy structural member according to  claim 9 , comprising at least one of a 3C product structural member or an automotive load-bearing structural member. 
     
     
         11 . The aluminum alloy structural member according to  claim 10 , wherein a mass ratio between Er and Zr is in a range of (0.01-0.5):1. 
     
     
         12 . The aluminum alloy structural member according to  claim 9 , wherein the aluminum alloy comprises Er, and a content of Er is in a range of 0-0.35%. 
     
     
         13 . The aluminum alloy structural member according to  claim 9 , wherein a mass ratio between Zr and Ti is in a range of (2-6):1. 
     
     
         14 . The aluminum alloy structural member according to  claim 9 , wherein a mass ratio between Zn and Cu is in a range of (1.2-2.5):1. 
     
     
         15 . The aluminum alloy structural member according to  claim 9 , wherein the aluminum alloy is a die-casting aluminum alloy. 
     
     
         16 . The aluminum alloy structural member according to  claim 9 , wherein a yield strength of the aluminum alloy is not less than 260 Mpa; a tensile strength is not less than 380 Mpa; an elongation at break is not less than 4%; a die-casting fluidity is not less than 90%; and a thermal conductivity is not less than 130 W/(m·K). 
     
     
         17 . The aluminum alloy structural member according to  claim 9 , wherein a yield strength of the aluminum alloy is in a range of 260-310 Mpa; a tensile strength is in a range of 380-440 Mpa; an elongation at break is in a range of 4-7%; a die-casting fluidity is not less than 90%; and a thermal conductivity is in a range of 130-150 W/(m K).